Migrate to WiX 5

[PranavSenthilnathan]

Depends on: dotnet/arcade#15933

Contributes to #116878

[NikolaMilosavljevic]

I've pushed the changes with c4720de - this fixes the host project build when using -wx switch in wix.exe build command. I am adding this switch to the build, in upcoming arcade change - this makes the build behave the same as if invoked using Wix build targets, instead of direct wix.exe build invocation. This also makes runtime build behave the same as sdk and aspnetcore builds.

[Copilot]

Pull Request Overview

This PR migrates the .NET runtime installer system from WiX 3 to WiX 5, updating the Windows Installer (.msi) generation infrastructure. The migration involves updating schema namespaces, syntax changes, and dependency configurations across multiple installer components.

Key changes include:

• Updates to WiX schema namespaces from v3 to v5 throughout the codebase
• Modernization of installer component definitions and syntax
• Addition of WiX 5 package dependencies in build files

Reviewed Changes

Copilot reviewed 22 out of 22 changed files in this pull request and generated 55 comments.

Show a summary per file

File	Description
src/installer/pkg/sfx/installers/host.wxs	Core installer definition updated for WiX 5 schema and component syntax
src/installer/pkg/sfx/installers/Directory.Build.*	Build configuration to include WiX 5 package references
src/installer/pkg/sfx/bundle/theme/*.wxl	Localization files updated to WiX 5 schema and syntax changes
src/installer/pkg/sfx/bundle/bundle.thm	Theme definition modernized for WiX 5 with improved accessibility
src/installer/pkg/sfx/bundle/Microsoft.NETCore.App.Bundle.bundleproj	Bundle project updated with WiX 5 dependencies
src/installer/pkg/sfx/Microsoft.NETCore.App/Directory.Build.*	Build files updated to include WiX 5 package references
eng/Versions.props	Version definitions for WiX 5 package dependencies

[jkoritzinsky]

LGTM!
nit: Can you fix the exlude -> exclude typos?

[joeloff]

Pranav and I chatted offline - there is an Arcade fix required to ensure that bundles are always x86 applications. Other than that, I'm ok to sign off

[PranavSenthilnathan]

/backport to release/10.0

[github-actions]

Started backporting to release/10.0: https://github.com/dotnet/runtime/actions/runs/17850381282

[github-actions]

@PranavSenthilnathan backporting to "release/10.0" failed, the patch most likely resulted in conflicts:

$ git am --3way --empty=keep --ignore-whitespace --keep-non-patch changes.patch

Applying: wix 5
Using index info to reconstruct a base tree...
M	eng/Versions.props
M	src/installer/pkg/sfx/installers/host.wxs
Falling back to patching base and 3-way merge...
Auto-merging eng/Versions.props
Auto-merging src/installer/pkg/sfx/installers/host.wxs
CONFLICT (content): Merge conflict in src/installer/pkg/sfx/installers/host.wxs
error: Failed to merge in the changes.
hint: Use 'git am --show-current-patch=diff' to see the failed patch
hint: When you have resolved this problem, run "git am --continue".
hint: If you prefer to skip this patch, run "git am --skip" instead.
hint: To restore the original branch and stop patching, run "git am --abort".
hint: Disable this message with "git config set advice.mergeConflict false"
Patch failed at 0001 wix 5
Error: The process '/usr/bin/git' failed with exit code 128

Please backport manually!